How bring old human ashes to the UK ?

Hello everyone,
Hope you are all well despite the current heat.

I was wondering how can you bring human ashes to the UK when the person was cremated over 40 years ago ?

This would be from France to the UK(England), I see that you need one of those :
Copy of Death Certificate.
Copy of Cremation Certificate.
A sign declaration from the funeral director or crematorium confirming the contents of the urn.
Ideally a copy of the deceased passport photo page.

But those seems to be for a « recent » death, what about when you get them after the end of a concession in a cemetery ? Or when you get them after the death of a family member ?

Thank you for reading and have a lovely day !